dobrown
commented
9 months ago Not an easy question to answer. The "resolution" of your raw position data is in principle somewhat less than a pixel, and the time resolution is typically 1/30 sec. But better to think in terms of uncertainty, which depends on many factors like the lighting, resolution and sharpness of the video, the care with which the tracks are marked, the calibration of the scale, possible perspective and/or radial distortions, etc. There is no set number, you just have to estimate it based on these factors. If you have multiple videos of the same thing, another option is to measure each independently and then find the mean and standard error of the measurements. But this won't include errors due to miscalibration, distortion, etc, which can sometimes be substantial. Time uncertainty is almost zero unless you are using a phone that drops occasional frames. Hope this helps.
On Thu, Dec 7, 2023 at 6:21 AM João Marcello Pereira < @.***> wrote:
How to obtain the resolution of timer, displacement, velocity in the Tracker?
— Reply to this email directly, view it on GitHub https://github.com/OpenSourcePhysics/tracker/issues/50, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAXIBFD7M4WGQFMX46EFIMTYIHGFLAVCNFSM6AAAAABALEQUHWVHI2DSMVQWIX3LMV43ASLTON2WKOZSGAZTAOBWGEYTQNI . You are receiving this because you are subscribed to this thread.Message ID: @.***>
jmarcellopereira
How to obtain the resolution of timer, displacement, velocity in the Tracker?